Icon for a display screen



FIG. 1 is a front view of an icon for a dispay screen showing my new design, on an enlarged scale, the icon is shown separately for clarity of illustration;

FIG. 2 is a front perspective view of an icon for a display screen; and,

FIG. 3 is a front view of an icon for a display screen.

The broken line drawing of a computer display screen in FIGS. 2 and 3 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a icon for a display screen, as shown and described. 